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VPN using hotspot with ios 10 not working

I frequently work offsite and use my AT&T iPhone 6s to tether my Windows 10 Pro work tablet (ASUS Transformer T300CHI). Although a lot of the places I work have Wifi, most do not allow VPN which I need to connect to my work server. After the ios 10 update (I am on 10.0.1), I have not had issues tethering, but VPN no longer works.


The Windows 10 Pro built-in VPN on my tablet has an automatic configuration that appears to detect the type of configuration (IKEv2/PPTP/IPSec/L2TP, etc) and you just put in username and password. According to my IT dept, the VPN connection in the office not only supports PPTP (which I understand has been disabled with ios 10) but also supports IKEv2 and L2TP/IPSec. Regardless, I always left VPN setup on Windows 10 in Automatic. I have tried selecting the type of connection but this has not worked either. I typically get a "VPN tunnels failed" error


Any thoughts would be appreciated

iPhone 6s, iOS 10

Posted on Sep 19, 2016 9:30 AM

Reply
50 replies

Sep 22, 2016 1:45 PM in response to MattyBH

So we are a small company - and do not have the funds to upgrade our VPN right now.

On the Mac's with Sierra - users are going with Shimo for $55 each. There are about 5 of them. Now they can VPN from their Mac's again.

However, when they try to VPN while tethered thru their iOS10 iPhone - it does not work.


How do we know if this is by design or a legitimate bug with iOS 10?

Sep 25, 2016 5:14 PM in response to MattyBH

I have been struggling with this for the last few days and think it is solved now. Not fully tested but able to establish a VPN connection. My issue was when using a windows 7 or windows 10 computer tethered or hotspot to an iPhone could not establish a vpn connection via L2TP after upgrade of iPhone to IOS10.0.1. As part of troubleshooting I also updated to iOS 10.0.2 but this is not related. See article https://support.microsoft.com/en-au/kb/926179 adding the appropriate dword 32bit of AssumeUDPEncapsulationContextOnSendRule under HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\PolicyAgent and setting the value to 2 worked for me. Requires a reboot. Has to do with windows vpn servers / clients behind nat devices. depending on your specific setup a value of 1 or 2 may be required.


Sep 26, 2016 6:22 AM in response to craigreilly

Tested 10.0.2 update with Shimo on Sierra....still no dice. I have confirmed Shimo works fine for PPTP using a verizon MiFi 6620L, but still not with the iPhone in hotspot mode, so this is clearly an iPhone Hotspot issue 100% that Apple has created. The Mifi also uses NAT same as iPhone in hotspot mode so this is appearing to be isolated to the iPhone only.

Sep 26, 2016 12:08 PM in response to ccolotti

Riiiight ...

It seems that on top of removing the support for PPTP from both MacOS Sierra and iOS 10 (which I can understand, as the encryption used by this protocol is really weak), Apple has decided to also remove support for PPTP passthrough from the hotspot on iOS 10 ... That's why the PPTP VPN does not work whilst being connected to iOS 10 hotspot.

That's a real bummer, as even when using 3rd party VPN software like Shimo, my MacBook Pro teamed with iPhone 7 is useless for connecting to the old (but still widely used) PPTP VPN servers. My Apple suddenly became much less useful ...

Sep 27, 2016 1:35 PM in response to MattyBH

same problem here since updating to 10.0.2. Before it was working fine with windows 10 pro.


what I have been able to do is making my phone visible by the system: just by refusing connection to Photos (USB). My phone was then appearing in the list of wifi available connections. But then when trying to connect iphone screen was doing strange blinking stuff. But not connecting at all. So if anyone has a solution please post!


THnks

serge

Sep 28, 2016 10:08 PM in response to MattyBH

Same boat here. I tried using L2TP on my Mac OS Server and forwarding ports to it, no dice.


IOS 10 was a free upgrade, unless you used PPTP VPN for your business. In that case you will be buying new routers, vpn clients, etc that will let you connect to your VPN. I'll probably fork out $300 for a router with l2tp vpn built in since I cannot get port forwarding to work.

VPN using hotspot with ios 10 not working

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